/* ============== CSS VARIABLES ============== */
    :root {
      --bg-1: 255, 99, 132;  /* gradient stop 1 */
      --bg-2: 53, 132, 255;  /* gradient stop 2 */
      --bg-3: 82, 255, 168;  /* gradient stop 3 */
      --glass: 255,255,255;  /* glass color */
      --ink: 20, 24, 33;     /* text color base */

      --surface: rgba(var(--glass), 0.18);
      --surface-strong: rgba(var(--glass), 0.28);
      --border: rgba(var(--glass), 0.35);
      --shadow: 0 10px 30px rgba(0,0,0,0.25);

      --radius-xl: 1.25rem;
      --radius-lg: 1rem;
      --radius-md: 0.75rem;

      --transition: 220ms cubic-bezier(.2,.8,.2,1);
    }

    @media (prefers-color-scheme: dark) {
      :root {
        --glass: 12,14,19;
        --ink: 235, 240, 255;
        --surface: rgba(var(--glass), 0.55);
        --surface-strong: rgba(var(--glass), 0.7);
        --border: rgba(255,255,255,0.08);
        --shadow: 0 20px 40px rgba(0,0,0,0.45);
      }
    }

    /* ============== PAGE ============== */
    * { box-sizing: border-box; }
    html, body { height: 100%; }
    body {
      margin: 0;
      font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
      line-height: 1.35;
      color: rgb(var(--ink));
      background: radial-gradient(1200px 800px at 10% 10%, rgba(var(--bg-1),0.35), transparent 55%),
                  radial-gradient(1400px 900px at 90% 0%, rgba(var(--bg-2),0.32), transparent 60%),
                  radial-gradient(1200px 900px at 50% 100%, rgba(var(--bg-3),0.30), transparent 50%),
                  linear-gradient(180deg, rgba(0,0,0,0.08), rgba(0,0,0,0.08));
      background-attachment: fixed;
      overflow-y: auto;
    }

    /* subtle animated sheen */
    body::before {
      content: "";
      position: fixed; inset: 0;
      background: linear-gradient(120deg, rgba(255,255,255,0.06), rgba(255,255,255,0) 20%, rgba(255,255,255,0.06) 40%, rgba(255,255,255,0) 60%);
      mix-blend-mode: overlay;
      animation: sheen 12s linear infinite;
      pointer-events: none;
    }
    @keyframes sheen { to { transform: translateX(20%); } }

    .container {
      max-width: 1080px;
      margin: 0 auto;
      padding: 2rem clamp(1rem, 3vw, 2rem);
      display: grid;
      gap: 1.25rem;
      grid-template-columns: 1fr;
    }

    .header {
      display: grid;
      gap: 1rem;
    }

    .title {
      display: flex; align-items: center; gap: .75rem;
      user-select: none;
    }
    .title .logo {
      width: 42px; height: 42px; border-radius: 12px; backdrop-filter: blur(10px);
      background: var(--surface-strong);
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      display: grid; place-items: center;
    }
    .title h1 { margin: 0; font-size: clamp(1.25rem, 2.4vw, 1.6rem); font-weight: 800; letter-spacing: -0.02em; }
    .title .tag { font-size: .9rem; opacity: .8; }

    .search {
      display: flex; gap: .6rem; align-items: center;
    }
    .input {
      flex: 1;
      display: flex; align-items: center; gap: .5rem;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: .8rem 1rem;
      box-shadow: var(--shadow);
      backdrop-filter: blur(14px) saturate(120%);
      transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    }
    .input:focus-within { transform: translateY(-1px); box-shadow: 0 16px 40px rgba(0,0,0,0.18); background: var(--surface-strong); }
    .input input {
      width: 100%; border: 0; outline: 0; background: transparent; color: rgb(var(--ink));
      font-size: 1rem; letter-spacing: .01em;
    }

    .btn {
      border: 1px solid var(--border);
      background: var(--surface-strong);
      color: rgb(var(--ink));
      padding: .8rem 1rem;
      border-radius: var(--radius-lg);
      font-weight: 600; letter-spacing: .01em;
      backdrop-filter: blur(10px) saturate(140%);
      box-shadow: var(--shadow);
      cursor: pointer;
      transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    }
    .btn:hover { transform: translateY(-1px); box-shadow: 0 16px 40px rgba(0,0,0,0.18); }

    /* ============== LAYOUT ============== */
    .grid {
      display: grid; gap: 1.25rem;
      grid-template-columns: 1.15fr .85fr;  /* left: main card, right: details */
    }
    @media (max-width: 980px) {
      .grid { grid-template-columns: 1fr; }
    }

    .card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-xl);
      padding: 1.1rem;
      box-shadow: var(--shadow);
      backdrop-filter: blur(16px) saturate(140%);
      transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    }
    .card:hover { transform: translateY(-1px); box-shadow: 0 20px 50px rgba(0,0,0,0.22); background: var(--surface-strong); }

    /* ============== CURRENT WEATHER ============== */
    .current {
      grid-template-columns: 1.2fr .8fr;
      gap: 1rem;
      align-items: center;
      min-height: 200px;
    }
    @media (max-width: 720px) {
      .current { grid-template-columns: 1fr; text-align: center; }
      .current .numbers { justify-content: center; }
    }

    .location-row { display: flex; align-items: center; gap: .6rem; opacity: .9; font-weight: 600; }
    .muted { opacity: .7; }

    .numbers { display: flex; align-items: center; gap: 1rem; }
    .temp { font-size: clamp(2.6rem, 8vw, 4.8rem); font-weight: 800; letter-spacing: -0.04em; line-height: .9; }
    .deg { font-weight: 700; opacity: .9; }
    .condition { font-size: clamp(1rem, 2.4vw, 1.25rem); font-weight: 700; }

    .meta {
      display: flex; gap: .6rem;
    }
    .chip {
      display: flex; align-items: center; gap: .5rem;
      background: rgba(255,255,255,0.06);
      border: 1px dashed var(--border);
      border-radius: var(--radius-md);
      padding: .55rem .7rem;
      font-size: .92rem;
    }

    .weather-visual {
      display: grid; place-items: center;
      padding: 1rem; position: relative;
    }
    .big-icon { width: 120px; height: 120px; }

    /* icon dropshadow */
    .big-icon svg { filter: drop-shadow(0 12px 22px rgba(0,0,0,.22)); }

    .tile .minmax { font-weight: 700; }

    /* ============== DETAILS ============== */
    .details {
      display: grid; gap: 1rem;
    }

    .kv {
      display: grid; grid-template-columns: 1fr 1fr; gap: .6rem .8rem;
    }
    .kv .row {
      display: flex; align-items: center; justify-content: space-between;
      padding: .7rem .9rem; border: 1px solid var(--border); border-radius: var(--radius-md);
      background: var(--surface);
    }
    .kv .label { opacity: .75; font-weight: 600; }
    .kv .value { font-weight: 800; letter-spacing: .01em; }

    /* ============== STATES ============== */
    .banner { display: none; padding: .85rem 1rem; border-radius: var(--radius-md); border: 1px solid var(--border); background: rgba(255,0,0,.08); font-weight: 600; }
    .banner.show { display: block; }

    .skeleton { position: relative; overflow: hidden; }
    .skeleton::after {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.22), transparent);
      animation: loading 1.4s infinite;
    }
    @keyframes loading { 0% { transform: translateX(-100%); } 100% { transform: translateX(100%); } }

    /* ============== UTILS ============== */
    .row { display: flex; gap: .6rem; align-items: center; }
    .spaced { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
    .muted-sm { font-size: .9rem; opacity: .7; }
    .divider { height: 1px; background: var(--border); margin: .6rem 0 0; }
    .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

    /* unit toggles */
    .toggles { display: inline-flex; gap: .25rem; padding: .25rem; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow); }
    .toggle { padding: .4rem .7rem; border-radius: 999px; font-weight: 700; border: 0; background: transparent; cursor: pointer; }
    .toggle[aria-pressed="true"] { background: var(--surface-strong); }

    /* footer */
    footer { text-align: center; opacity: .7; padding: .6rem; font-size: .9rem; }